Jurisdiction - The supervisory jurisdiction of the court over its officers - Whether the jurisdiction is limited to undertakings given by attorneys-at-law - Whether it is compensatory or punitive – Whether the fixed date claim form discloses reasonable grounds for bringing the claim - Whether defendants waived their right to make the preliminary objection by filing an affidavit in answer - Whether a cause of action needed for declaratory relief - Whether undertaking given to the court merged into the final judgment